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Re: max IP packet size = 9216 B. Why?


> sendto returns the error code 322 or EMSGSIZE "Message too long".
> I forgot to tell that's because the high water level of the send socket 
> (o->so_snd.sb_hiwat) is 9216 B (=0x2400) (in file 
> bsd_tcpip/current/src/sys/kern/uipc_socket.c:523).
> 
> I will try to increase the socket's high water level (after I have found 
> where it is set ;-).

I think you can set it with setsockopt(). The option names are
SO_SNDBUF & SO_RCVBUF. However, there might be a system check to
ensure they are not too large.

       Andrew

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